Sensation and Perception Flashcards
bottom up processing
sensation
the process by which we receive physical energy from the environment through our senses then travels to the brain
sensation
the focusing of conscious awareness on one particular stimulus; choosing what to pay attention to
selective attention
failing to see visible objects when our attention is directed elsewhere
inattention blindness
failing to notice changes in the environment
change blindness
the minimum stimulation needed to detect a particular stimulus 50% of the time
absolute threshold
below one’s absolute threshold for conscious awareness
subliminal
the minimum difference between two stimuli required for detection 50% of the time =, experience as a just noticeable difference
difference threshold
the principle that, to be perceived as different, two stimuli must differ by a constant percentage
Webers law
diminished sensitivity as a consequence of constant stimulation
sensory adaptation
when hot tubs don’t feel hot anymore because you’re used to it, this is because of
sensory adaptation
we can only hear one voice among many
cocktail party phenomenon
distance from peak to peak, determines the hue
frequency/wavelength
vision short waves=
bluish colors
vision long waves=
relish colors
determines the brightness
amplitude, intensity, height
vision greater amp=
brighter colors
vision shorter amp=
duller colors
outer layer of the eye
cornea
white gel between the lens &retina
vitreous humor/ fluid/chamber
adjustable opening in the center of the eye
pupil
muscle around the pupil, colored portion, controls the size
irus
transparent structure behind the pupil, changes shape to focus images on the retina
lens
the process of the lens changing shape to help focus on the near or far objects
accomodation
clouding of the lens; difficulty recognizing depth
cataracts
sharpness of vision
acuity
seeing things close up more clearly than far away
nearsightedness
seeing things far away more clearly than close up
farsightedness
myopia
nearsightedness
hyperopia
farsightedness
inner surface of the eye, contains rods and cones, transduction takes place
retina
transforming of stimulus energies into neural impulses
transduction
central point in the retina, house cones
forea
carries neural impulses to the brain (thalamus to occipital bone)
optic nerve
are individual neurons—or groups of neurons—in the brain which code for perceptually significant stimuli
feature detectors
allows us to see in bright light, different colors
cones
allows us to see black and whites, peripheral vision
rods
where the optic nerve leaves the eye, no receptor cells are located there
blind spot
stimultaneous processing of several aspects of a problem
parallel processing
we can’t see certain colors together in a combination, these are antagonists/ apponents colors
opponent processing theory
we have 3 cones (red, blue, green), all types of colors come from combinations of these colors
trichromatic theory
hereditary, Ishihara color test, color deficiency, usually reds and greens
color blindness
the sense of hearing
audition